Stop-watch



(Model.)

G. P. CORLISS.

STOP WATCH.

No. 339,862. Patented Apr. 13, 1886.

n. mins. mfrunqnpw. c.

UNITED STATES PATENTv OFFICE.

CHARLES P. CORLISS, OF ELGIN, ASSIGNOR TO THE ELGIN NATIONAL VATCH COMPANY, OF CHICAGO, ILLINOIS.

STO P-WATC H SPECIFICATION forming part of Letters Patent No. 339,862, dated April 13, 1886.

Application filed August 2B, 1884. Serial No. 141,651. (Model.)

T0 all whom'zlt may concern.-

Be it known that I, GHARLEs P. CoRLrss, of Elgin, in the county of Kane, and in the State of Illinois, have invented certain new and useful Improvements in StOp-VVatches; and I do hereby declare that the following is a full, clear, exact description thereof, reference being had to the accompanying drawings, in which Figure I is a perspective view of the front or dial side of a movement having my iniprovenients, a portion of the dial being broken away to show the supplemental minutes-,hand arbor. Fig. 2 is a like view of the opposite side of the same. Fig. 3 is an enlarged perspective view of the winding-arbor and sectional sleeve separated from each other. Fig. 4 is a like View of the same combined. Fig. 5 is an enlarged perspective view of the parts which furnish a bearing for the seconds-arbor, separated from each other. Fig. 6 is a like view of the same combined. Fig. 7 is an enlarged perspective view of the combined ratchet and cam wheels and their connecting parts, and Fig. 8 is an enlarged section upon line a; .e of Figs. I and 2. Y

Letters of like name and kind refer to parts in each of the figures.

My invention relates to improvements in stop-watches; and it consists, principally, in the means employed for enabling the timinghands to be started, stopped, and set at zero, substantially as and fo r the purpose hereinafter specified.

It consists, further, as an improvement in stop-watches, in a supplemental minuteshand arbor journaled at or within the axis of the main wheel of the winding attachment, substantially as and for the purpose hereinafter shown and described.

It consists, finally, as an improvement in stop-watches, in asupplemental minutes-hand arbor, which is journaled within the axis of the main wheel of the winding attachment in a line with theaxis of the windingarbor, substantially as and for the purpose hereinafter speced.

In the annexed drawings, A represents the front or pillar plate of a watch, and B the back plate or winding-bridge, which parts are constructed and combined in the usual manner.

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Journaled between the plate A and bridge B is a winding-arbor, C, which at its outer end is adapted to engage with a push-pin, D, and at its inner end is provided with a pinion, c, that meshes with and imparts motion to a toothed wheel, E, which is pivoted upon the outer face of said plate A, and constitutes the main wheel of the winding attachment. The Wheel E is preferably pivoted upon a boss that is formed upon the plate A, and is held in position thereon by means of a washer, e, and screw c'; but any desired construction may be used for pivoting said wheel in place.

Journaled within the plate A and bridge B, at the axis of the winding-wheel E, and in a line with the axis of the windingarbor C, is an arbor, F, which upon its front end carries a hand, f, and, being'suitably connected with the time-train, operates to register minutes upon a supplemental dial, g, that is provided within the ordinary dial, G. Such location of said supplcn'iental arbor in no mamierinterferes with the ordinary time'train of a watch, and renders practicable the utilization of such time-train without change in the construction of a stopwatch, while otherwise a special movement differently arranged would be necessary.

The longitudinal movement of the pusltpin D is employed for starting, stopping, and setting at Zero the timing-hands, and as a means for communicating motion from the former to the latter I employasleeve, H, which is placed upon and adapted to move lengthwise of the winding-arbor C between the plate A and bridge B, and is held outward with a yielding pressure by means of a spring, I. The outer end of said sleeve impingcs upon the inner side of the case-spring K, and the inner end of said puslrpin upon the outer side of the same, while upon an arm, h, that projects from said sleeve radially rearward through said bridge is pivoted a pawl, h', which engages with a ratchet-wheel, L, and when the push-pin is moved inward rotates said wheel a distance equal to the circumferential length of one of its teeth. Upon the outward movement of said sleeve said pawl trips over and engages with the next succeeding tooth, and is thenin position for edecting a farther partial revolution of said ratchet-wheel when said push-pin IOO 'said mechanism being of any usual form or construction.

In order that variations in thel thickness or position of the case-spring K may be compensated and the movement readily adjusted to a case, the sleeve H has its interior made considerably larger than the Winding-arbor C, and is provided with a screw-thread. Into said threaded interior is placed a second exteriorly-threaded sleeve, 7L, Which fits loosely upon said winding-arbor, and is preferably split longitudinally a portion of its length, so as to cause it to be firmly held in place by the outward spring of its divided portion, while l'ree to be rotated by means of a screw-driver. The outer end of the inner sleeve, h2, now forms the bearing against the case-spring K, and by turning the former within the sleeveH its said bearing end may be extended or. retracted as much as may be necessary to adapt it to the position or thickness of said spring.

In open-face Watches,where no casevsprings are used, the bearing end ot' the adjustable sleeve is extended to and receives the inner end of the push-pin.

The construction described enables the stopwatch movement to be easily and quickly tted to and placed in any case for which it is adapted without other change than can be produced by means of a screwdriver.

Having thus fully set forth the nature and merits of my invention, what I claim as new 1sl. As an improvement in stop-Watches, the combination, with mechanism for leturning the timing-hands to zero, and with a push-pin that is journaled within the casestem, of a sleeve which surrounds the winding-arbor and is engaged by said push-pin, and a pawl that is pivoted only upon said sleeve and is adapted to engage with al ratchet-wheel, whereby the longitudinal movements of said push-pin will be communicated to and cause a step-by-step rotation of said ratchet-wheel, substantially as and for the purpose specified.

2. As au improvement in stop-watches, the combination of a push-pin which is journaled within the case-stem, a sleeve that encircles the winding-arbor and is engaged by said pushpin, a pawl Which is pivoted only upon said sleeve, a ratchet-wheel that is engaged by said pawl and by rotation is adapted to actuate mechanism for starting, stopping, and returning the timing-hands to zero, and a spring which operates to hold said sleeve with a yield ing pressure at the outer limit of its motion, whereby the longitudinal motion of said pushpin will cause a step-by-step rotation of said ratchet-wheel, substantially as. and for the purpose shown. l

3. As an improvement in stop-watches, a supplemental minutes-hand arbor j ournaled at or within the aXis of the main wheel ofthe winding attachment, substantially as and for the purpose shown anddescribed.

4. As an improvement in stop-watches, a supplemental minutes-hand arbor which. is journaled within the axis of the main wheel of the winding attachment in a line with the axis of the winding-arbor, substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand t-his 21st day of July, A. D. l1884.

CHARLES P. conmss.

Vitnesses:

f WILLIAM H. CLOUDMAN, H. L. GIVEN, 

